LDO Micropower Regulators

www.DataSheet4U.com LT1762 Series 150mA, Low Noise, LDO Micropower Regulators U Dropout Voltage 400 350 20 40 60 80 100 120 140 160 OUTPUT CURRENT (mA) 1762 TA02 FEATURES s s s s s s s s s s s DESCRIPTIO s s s s Low Noise: 20µVRMS (10Hz to 100kHz) Low Quiescent Current: 25µA Wide Input Voltage Range: 1.8V to 20V Output Current: 150mA Very Low Shutdown Current: < 1µA Low Dropout Voltage: 300mV No Protection Diodes Needed Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V Adjustable Output from 1.22V to 20V Stable with 2.2µF Output Capacitor Stable with Aluminum, Tantalum or Ceramic Capacitors Reverse Battery Protection No Reverse Current Overcurrent and Overtemperature Protected 8-Lead MSOP Package APPLICATIO S s s s s Cellular Phones Battery-Powered Systems Frequency Synthesizers Noise-Sensitive Instrumentation Systems The LT ®1762 series are micropower, low noise, low dropout regulators. The devices are capable of supplying 150mA of output current with a dropout voltage of 300mV. Designed for use in battery-powered systems, the low 25µA quiescent current makes them an ideal choice. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. A key feature of the LT1762 regulators is low output noise. With the addition of an external 0.01µF bypass capacitor, output noise drops to 20µVRMS over a 10Hz to 100kHz bandwidth. The LT1762 regulators are stable with output capacitors as low as 2.2µF. Small ceramic capacitors can be used without the series resistance required by other regulators. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The parts come in fixed output voltages of 2.5V, 3V, 3.3V and 5V, and as an adjustable device with a 1.22V reference voltage. The LT1762 regulators are available in the 8-lead MSOP package. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION 3.3V Low Noise Regulator DROPOUT VOLTAGE (mV) 300 250 200 150 100 50 0 0 VIN 3.7V TO 20V IN 1µF OUT SENSE LT1762-3.3 0.01µF SHDN BYP GND U U + 3.3V AT 150mA 20µVRMS NOISE 10µF 1762 TA01 1 LT1762 Series ABSOLUTE MAXIMUM RATINGS (Note 1) PACKAGE/ORDER INFORMATION TOP VIEW OUT SENSE/ADJ* BYP GND 1 2 3 4 8 7 6 5 IN NC NC SHDN IN Pin Voltage ........................................................ ±20V OUT Pin Voltage .................................................... ±20V Input to Output Differential Voltage ....................... ±20V SENSE Pin Voltage ............................................... ±20V ADJ Pin Voltage ...................................................... ±7V BYP Pin Voltage.................................................... ±0.6V SHDN Pin Voltage ................................................. ±20V Output Short-Circut Duration .......................... Indefinite Operating Junction Temperature Range (Note 2) ............................................ – 40°C to 125°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C ORDER PART NUMBER LT1762EMS8 LT1762EMS8-2.5 LT1762EMS8-3 LT1762EMS8-3.3 LT1762EMS8-5 MS8 PART MARKING LTHF LTHG LTHH LTHJ LTHK MS8 PACKAGE 8-LEAD PLASTIC MSOP *PIN 2: SENSE FOR LT1762-2.5/ LT1762-3/LT1762-3.3/LT1762-5 ADJ FOR LT1762 TJMAX = 150°C, θJA = 125°C/ W SEE THE APPLICATIONS INFORMATION SECTION. Consult factory for Industrial and Military grade parts. ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2) PARAMETER Minimum Operating Voltage Regulated Output Voltage (Note 4) CONDITIONS ILOAD = 150mA LT1762-2.5 VIN = 3V, ILOAD = 1mA 3.5V < VIN < 20V, 1mA < ILOAD < 150mA LT1762-3 VIN = 3.5V, ILOAD = 1mA 4V < VIN < 20V, 1mA < ILOAD < 150mA q q q q q q q q q q q q MIN 2.475 2.435 2.970 2.925 3.267 3.220 4.950 4.875 1.208 1.190 TYP 1.8 2.5 2.5 3 3 3.3 3.3 5 5 1.22 1.22 1 1 1 1 1 4 4 MAX 2.3 2.525 2.565 3.030 3.075 3.333 3.380 5.050 5.125 1.232 1.250 5 5 5 5 5 12 25 15 30 17 33 25 50 6 12 UNITS V V V V V V V V V V V mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV LT1762-3.3 VIN = 3.8V, ILOAD = 1mA 4.3V < VIN < 20V, 1mA < ILOAD < 150mA LT1762-5 ADJ Pin Voltage (Notes 3, 4) Line Regulation LT1762 VIN = 5.5V, ILOAD = 1mA 6V < VIN < 20V, 1mA < ILOAD < 150mA VIN = 2V, ILOAD = 1mA 2.3V < VIN < 20V, 1mA < ILOAD < 150mA ∆VIN = 3V to 20V, ILOAD = 1mA ∆VIN = 3.5V to 20V, ILOAD = 1mA ∆VIN = 3.8V to 20V, ILOAD = 1mA ∆VIN = 5.5V to 20V, ILOAD = 1mA ∆VIN = 2V to 20V, ILOAD = 1mA VIN = 3.5V, ∆ILOAD = 1mA to 150mA VIN = 3.5V, ∆ILOAD = 1mA to 150mA VIN = 4V, ∆ILOAD = 1mA to 150mA VIN = 4V, ∆ILOAD = 1mA to 150mA VIN = 4.3V, ∆ILOAD = 1mA to 150mA VIN = 4.3V, ∆ILOAD = 1mA to 150mA VIN = 6V, ∆ILOAD = 1mA to 150mA VIN = 6V, ∆ILOAD = 1mA to 150mA VIN = 2.3V, ∆ILOAD = 1mA to 150mA VIN = 2.3V, ∆ILOAD = 1mA to 150mA LT1762-2.5 LT1762-3 LT1762-3.3 LT1762-5 LT1762 (Note 3) LT1762-2.5 LT1762-3 LT1762-3.3 LT1762-5 LT1762 (Note 3) Load Regulation q 5 q 9 q 1 q 2 U W U U W W W LT1762 Series ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2) PARAMETER Dropout Voltage VIN = VOUT(NOMINAL) (Notes 5, 6) CONDITIONS ILOAD = 1mA ILOAD = 1mA ILOAD = 10mA ILOAD = 10mA ILOAD = 50mA ILOAD = 50mA ILOAD = 150mA ILOAD = 150mA GND Pin Current VIN = VOUT(NOMINAL) (Notes 5, 7) ILOAD = 0mA ILOAD = 1mA ILOAD = 10mA ILOAD = 50mA ILOAD = 150mA COUT = 10µF, CBYP = 0.01µF, ILOAD = 150mA, BW = 10Hz to 100kHz (Notes 3, 8) VOUT = Off to On VOUT = On to Off VSHDN = 0V VSHDN = 20V VIN = 6V, VSHDN = 0V VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 150mA VIN = 7V, VOUT = 0V VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 0.1V VIN = – 20V, VOUT = 0V LT1762-2.5 LT1762-3 LT1762-3.3 LT1762-5 LT1762 (Note 3) VOUT = 2.5V, VIN < 2.5V VOUT = 3V, VIN < 3V VOUT = 3.3V, VIN < 3.3V VOUT = 5V, VIN < 5V VOUT = 1.22V, VIN < 1.22V q q q q q MIN TYP 0.09 0.15 MAX 0.15 0.19 0.21 0.25 0.27 0.31 0.33 0.40 65 120 500 1.8 7 100 2 UNITS V V V V V V V V µA µA µA mA mA µVRMS nA V V µA µA q 0.21 q 0.27 q q q q q q 25 70 350 1.3 4 20 30 0.25 0.8 0.65 0.1 1 0.1 50 65 300 160 Output Voltage Noise ADJ Pin Bias Current Shutdown Threshold SHDN Pin Current (Note 9) Quiescent Current in Shutdown Ripple Rejection Current Limit Input Reverse Leakage Current Reverse Output Current (Note 10) 1 µA dB mA mA 1 10 10 10 10 5 20 20 20 20 10 mA µA µA µA µA µA Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1762 regulators are tested and specified under pulse load conditions such that TJ ≈ TA. The LT1762 is 100% tested at 25°C. Performance at – 40°C and 125°C is assured by design, characterization and correlation with statistical process controls. Note 3: The LT1762 (adjustable version) is tested and specified for these conditions with the ADJ pin connected to the OUT pin. Note 4: Operating conditions are limited by maximum junction temperature. The regulated output voltage specification will not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current, the input voltage range must be limited. Note 5: To satisfy requirements for minimum input voltage, the LT1762 (adjustable version) is tested and specified for these conditions with an external resistor divider (two 250k resistors) for an output voltage of 2.44V. The external resistor divider will add a 5µA DC load on the output. Note 6: Dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a specified output current. In dropout, the output voltage will be equal to: VIN – VDROPOUT. Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) and a current source load. This means the device is tested while operating in its dropout region. This is the worst-case GND pin current. The GND pin current will decrease slightly at higher input voltages. Note 8: ADJ pin bias current flows into the ADJ pin. Note 9: SHDN pin current flows into the SHDN pin. Note 10: Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the OUT pin and out the GND pin. 3 LT1762 Series TYPICAL PERFORMANCE CHARACTERISTICS Typical Dropout Voltage 500 450 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 400 350 300 250 200 150 100 50 0 0 20 40 60 80 100 120 140 160 LOAD CURRENT (mA) 1762 G01 TJ = 125°C TJ = 25°C Quiescent Current 40 35 QUIESCENT CURRENT (µA) VIN = 6V RL = ∞, IL = 0 (LT1762-2.5/-3/-3.3/-5) RL = 250k, IL = 5µA (LT1762) OUTPUT VOLTAGE (V) 25 20 15 10 5 0 –50 –25 0 25 50 75 100 125 VSHDN = VIN 2.51 2.50 2.49 2.48 2.47 2.46 –50 –25 0 25 50 75 100 125 OUTPUT VOLTAGE (V) 30 TEMPERATURE (°C) 1762 G04 LT1762-3.3 Output Voltage 3.360 IL = 1mA 3.345 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.315 3.300 3.285 3.270 3.255 3.240 –50 –25 0 25 50 75 100 125 5.025 5.000 4.975 4.950 4.925 4.900 –50 –25 0 25 50 75 100 125 ADJ PIN VOLTAGE (V) 3.330 TEMPERATURE (°C) 1762 G07 4 U W Guaranteed Dropout Voltage 500 450 400 350 300 250 200 150 100 50 0 0 20 40 60 80 100 120 140 160 LOAD CURRENT (mA) 1762 G02 Dropout Voltage 500 450 = TEST POINTS TJ ≤ 125°C 400 350 300 250 200 150 100 50 0 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 IL = 1mA IL = 50mA IL = 10mA IL = 150mA TJ ≤ 25°C 1762 G03 LT1762-2.5 Output Voltage 2.54 IL = 1mA 2.53 2.52 3.045 3.030 3.015 3.000 2.985 2.970 2.955 3.060 LT1762-3 Output Voltage IL = 1mA 2.940 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 1762 G05 TEMPERATURE (